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1、摘要冷闭塞锻造是国际上九十年代初出现的塑性加工最新技术，是现代计算机技术、材料科学、精密加工、测量技术和计算力学与传统塑性成形技术相结合的产物。作为最先进的精密成形技术之一，冷闭塞锻造工艺以其精密、优质、高效、低消耗、低成本、大批量等生产特点，成为世界塑性加工技术发展的重要方向。长期以来，我国汽车生产，尤其在精密成形技术方面处于落后位置。随着我国汽车生产，尤其是轿车生产的大规模化与全球性竞争的日趋激烈，积极开发冷闭塞锻造成套技术并使之尽快产业化意义重大。本人设计的是用闭塞锻造的方法直接加工成形直齿圆锥齿轮，即通过挤压封闭腔中的坯料来加工成形直齿圆锥齿轮
2、，采用精锻（挤压）方法成形的齿轮有沿齿廓合理分布而连续的金属流线和致密组织，其齿轮的强度、齿面的耐磨能力、热处理变形量和啮合噪声等都优于切削加工的齿轮。与切削加工相比，精锻齿轮的强度可提高20%、抗弯疲劳寿命提高20%、热处理变形量比切削齿轮减少30%、生产效率提高了2倍以上、生产成本降低20%以上。生产批量在300～500件以上时，经济上更合理的。关键字：直齿圆锥齿轮，闭塞锻造，挤压，凹模，凸模2AbstractColdunenlightenedforgingistheplasticprocessingnewesttechnologywhichont
3、heinternationalatthebeginningof90'sappears,isproductwhichmoderncomputertechnology,thematerialsscience,thepreciseprocessing,thesurveytechnologyandcomputationmechanicsandthetraditionalplasticityformingtechnologyunifies.Oneofasmostadvancedpreciseformedtechnologies,thecoldunenlighte
4、nedforgingcraftbyitsprecise,highquality,ishighlyeffective,productioncharacteristicandsoonthelowconsumption,lowcost,massbecomestheimportantdirectionoftheworldplasticityprocessingtechnologicaldevelopment.Sincelongago,ourcountryautomobileproductionisinthebackwardpositionespeciallyi
5、nthepreciseformedtechnologyaspect.Alongwithourcountryautomobileproduction,thepassengervehicleproduceslarge-scaleandtheglobalcompetitioninparticularisdaybydayintense,positivelydevelopsthecoldunenlightenedforgingcompletesettechnologyandcausesitassoonaspossibleindustrialproductionw
6、atershed.Mydesignwiththeunenlightenedforgingmethoddirectprocessingformingstraighttoothbevelgear,namelyprocessestheformedstraighttoothbevelgearthroughtheprecisedropforging,usesthefinishforgemethodformingthegeartohavealongthetoothprofilereasonabledistributionbutthecontinualmetalst
7、reamlineandthecompacttexture,itsgearintensity,thetoothfacewear-resistingability,heattreatmentDistortionQuantityandmeshthenoiseandsoonallasaresultofthemachininggear.Compareswiththemachining,thefinishforgegearintensitymayenhance20%,theanti-curvedfatiguelifeenhances20%,theheattreat
8、mentDistortionQuantityratiocutsthegeartoreduce3
